body {
  text-align: center;
}

#main {
  text-align: left;
  width: 1000px;
  margin: 0 auto;
}

table tr td > div {
  width: 480px;
  height: 300px;
  margin: 10px;
}

table tr td > div > div.panel-body {
  margin-left: 5px;
  margin-right: 5px;
}
